CN209825534U

CN209825534U - Straight hair curler

Info

Publication number: CN209825534U
Application number: CN201920465355.6U
Authority: CN
Inventors: 林志华
Original assignee: Wenzhou Sabeco Technology Co Ltd
Current assignee: Wenzhou Sabeco Technology Co Ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2019-12-24
Anticipated expiration: 2029-04-08

Abstract

The utility model discloses a straight hair curler, which comprises a straight hair plate, a middle plate, a hair curling plate and a locking mechanism connected with the straight hair plate, the middle plate and the hair curling plate; wherein, the first side of the middle plate is plate-shaped, and the second side is wavy; the side wall of the hair straightening plate facing the middle plate is plate-shaped, and the hair straightening plate can be clamped with the first side of the middle plate in a matching mode to straighten hair; the side wall of the hair curling plate facing the middle plate is wavy, and the hair curling plate can be matched with the second side of the middle plate to clamp so as to curl hair; the tail part of the hair straightening plate and the tail part of the hair curling plate are respectively hinged with the tail part of the middle plate; the locking mechanism is used for locking one of the hair straightening plate and the hair curling plate with the middle plate. When using the straight curler that this application provided, straight hair board and intermediate lamella cooperation realize directly sending out the function, and the function is curld hair to curly hair board and intermediate lamella cooperation realization, has solved single product and has realized the multi-functional problem of straight book simultaneously, and has the guard action to the hair at the curly hair in-process.

Description

Straight hair curler

Technical Field

The utility model relates to a hair-dressing instrument technical field, more specifically say, relate to a straight curler.

Background

The hair straightener and the hair curler are also called as an electric splint, are commonly called as a splint, and are used for heating a heating element MCH or PTC or a heating wire of the hair straightener or the hair curler by current, transmitting the heating element MCH or PTC or the heating wire to heating conductors such as an aluminum plate or a ceramic plate and the like to heat, and straightening or curling hair by the heating conductors.

In the prior art, the function of the splint is single, and most of products can only realize the function of straightening hair or curling hair; and a few products capable of realizing the double functions of straight coiling have the coiling function realized by arranging a plurality of triangular heating conductors, and the triangular heating conductors have great damage to hair quality in the using process.

In summary, the problem to be solved by those skilled in the art is how to provide a product capable of straightening hair and curling hair and protecting hair of a user.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a hair straightening and curling device, which can achieve the dual functions of hair straightening and curling according to the requirement of the user, and protect the hair during the hair curling process.

In order to achieve the above object, the present invention provides the following technical solutions:

a straight hair curler comprising:

a middle plate with a plate-shaped first side and a wavy second side;

the hair straightening plate is used for being matched with the first side of the middle plate to clamp and straighten hair, the side wall of the hair straightening plate facing the middle plate is plate-shaped, and the tail part of the hair straightening plate is hinged with the tail part of the middle plate;

a curling plate for clamping with the second side of the middle plate to curl hair, the curling plate being waved toward the side wall of the middle plate, and a tail portion of the curling plate being hinged to the tail portion of the middle plate;

and the locking mechanism is used for attaching and locking one of the hair straightening plate and the hair curling plate with the middle plate, and the middle plate, the hair straightening plate and the hair curling plate are respectively connected with the locking mechanism.

Preferably, the lateral walls of the hair straightening plate, the middle plate and the hair curling plate can be spliced into a cylindrical structure for curling hair in a state that the first side and the second side of the middle plate are respectively attached to the hair straightening plate and the hair curling plate.

Preferably, the side wall of the hair straightening plate or the hair curling plate, which is far away from the middle plate, is provided with comb teeth for combing hair.

Preferably, the side wall of the hair straightening plate or the hair curling plate, which faces away from the middle plate, is hinged with a clamping piece, and the clamping piece is used for being matched with the cylindrical structure to clamp hair.

Preferably, the tail parts of the hair straightening plate, the hair curling plate and the middle plate are respectively provided with a hair straightening key, a hair curling key and a middle key, and the hair straightening key, the hair curling key and the middle key are hinged through hinge rods; the locking mechanism comprises a lock pin rod arranged on the middle key, and the hair straightening key and the hair curling key are respectively provided with a lock pin structure which can be matched and fixed with the lock pin rod.

Preferably, the lock pin rod comprises a rod body and a convex block arranged on the periphery of the rod body; the locking pin structure comprises a locking pin hole, one side of the locking pin hole is a large hole capable of containing the lug, the other side of the locking pin hole is a sliding hole capable of allowing the rod body to move, and an inward shrinkage structure used for preventing the lug from sliding from the large hole to the sliding hole is arranged at the intersection of the sliding hole and the large hole; the locking mechanism further comprises a gear shifting key for pushing the locking pin rod in the axial direction, so that the protruding block is located in the large hole of the hair straightening key or located in the large hole of the hair curling key.

Preferably, the middle key is provided with a locking through hole attached to the middle part of the lock pin rod; the lock pin hole includes: the locking pin rod comprises a left straight hair key locking pin hole, a right straight hair key locking pin hole, a left hair curling key locking pin hole and a right hair curling key locking pin hole, wherein the left straight hair key locking pin hole and the right straight hair key locking pin hole are formed in the straight hair key, the left hair curling key locking pin hole and the right hair curling key locking pin hole are formed in the hair curling key, and the left straight hair key locking pin hole, the left hair curling key locking pin hole, the locking through hole, the right hair curling key locking pin hole and the right straight hair key locking pin; the convex block comprises a left convex block and a right convex block, and the space between the left convex block and the right convex block is equal to the space between the straight key lock pin hole on the left side and the straight key lock pin hole on the right side.

Preferably, the hair curling key is arranged between the hair straightening key and the middle key, the hair straightening key is connected with a pressing handle, a return spring is arranged inside the hair straightening key, one end of the return spring abuts against the pressing handle, and the other end of the return spring abuts against the hair curling key.

Preferably, the hair straightening switch further comprises a handle convenient to operate, the handle is fixedly connected with the hair straightening key, the hair curling key and the middle key, a power line and an on-off key are arranged at the tail of the handle, and the gear shifting key is arranged on the side wall of the handle.

The utility model provides a straight hair curler, which comprises a middle plate, a straight hair plate, a hair curling plate and a locking mechanism connected with the middle plate, wherein the tail part of the straight hair plate and the tail part of the hair curling plate are respectively hinged with the tail part of the middle plate; the side wall of the hair straightening plate facing the middle plate is plate-shaped, and the hair straightening plate and the plate-shaped first side of the middle plate can be matched to clamp and straighten hair; the side wall of the hair curling plate facing the middle plate is wavy, and the hair curling plate and the wavy second side of the middle plate can be matched to clamp and curl hair; the locking mechanism can attach and fix one of the hair straightening plate and the hair curling plate with the middle plate.

The application provides a straight curler is provided with intermediate lamella, straight hair board, curly hair board, and in the use, locking mechanism will straighten one in hair board, the curly hair board and intermediate lamella locking, another kind then uses with the intermediate lamella cooperation, has realized straightening the difunctional of hair and curly hair. Meanwhile, the second sides of the hair curling plate and the middle plate are wavy, so that compared with a mode of adopting a triangular heating conductor in the prior art, the wavy structure can reduce the damage to the hair in the hair curling process, and the effect of protecting the hair is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a straight hair curler provided by the present invention;

fig. 2 is an exploded view of the cleat assembly provided by the present invention;

fig. 3 is an exploded view of the adjustment assembly provided by the present invention;

fig. 4 is a schematic structural view of a lock pin rod provided by the present invention;

fig. 5 is a schematic structural view of the hair straightening key provided by the present invention;

fig. 6 is a schematic structural view of a hair curling key according to the present invention.

The reference numerals in figures 1 to 6 are:

the device comprises a clamping plate component 1, an adjusting component 2, a handle 3, an on-off key 4, a power line 5 and a gear shifting key 6;

a hair straightening plate 101, a middle plate 102, a hair curling plate 103, comb teeth 104 and a clamping piece 105;

a hair straightening key 201, a middle key 202, a hair curling key 203, a hinge rod 204, a hinge hole 205, a hair straightening key lock pin hole 206, a lock through hole 207, a hair curling key lock pin hole 208, a lock pin rod 209, a pressing handle 210 and a return spring 211; left projection 2091, right projection 2092, middle projection 2093.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a straight curler has solved the problem that single product can't have concurrently and straighten hair and curly hair dual function, has reduced the damage of curly hair to the hair simultaneously.

Referring to fig. 1 to 6, fig. 1 is a schematic structural view of a straight hair curler provided by the present invention; fig. 2 is an exploded view of the cleat assembly provided by the present invention; fig. 3 is an exploded view of the adjustment assembly provided by the present invention; fig. 4 is a schematic structural view of a lock pin rod provided by the present invention; fig. 5 is a schematic structural view of the hair straightening key provided by the present invention; fig. 6 is a schematic structural view of a hair curling key according to the present invention.

The application provides a straight curler, which comprises a straight hair plate 101, an intermediate plate 102, a hair curling plate 103 and a locking mechanism connected with the straight hair plate, the intermediate plate 102 and the hair curling plate 103; wherein, the first side of the middle plate 102 is plate-shaped, and the second side is wave-shaped; the side wall of the hair straightening plate 101 facing the middle plate 102 is plate-shaped, and the hair straightening plate 101 can be clamped with the first side of the middle plate 102 in a matching manner to straighten hair; the side wall of the hair curling plate 103 facing the middle plate 102 is wavy, and the hair curling plate 103 can be clamped with the second side of the middle plate 102 to curl hair; the tail part of the hair straightening plate 101 and the tail part of the hair curling plate 103 are respectively hinged with the tail part of the middle plate 102; the locking mechanism is used for attaching and locking one of the hair straightening plate 101 and the hair curling plate 103 with the middle plate 102.

Specifically, referring to fig. 1, the whole straight hair curler provided by the present application is a long strip shape, one end of which is a clamping plate assembly 1, the other end of which is a handle 3 convenient for a user to hold and operate, and an adjusting assembly 2 for connecting the clamping plate assembly 1 and the handle 3 is arranged between the clamping plate assembly 1 and the handle. For convenience of description, the end near the handle 3 is referred to as the tail end and the end near the cleat assembly 1 is referred to as the front end.

Referring to fig. 2, the clamping plate assembly 1 specifically includes three clamping plates, i.e., a hair straightening plate 101, a middle plate 102, and a hair curling plate 103, which are all bar-shaped and arranged in sequence along the thickness direction of the hair straightening curler. In the use, adjacent both cooperations are used in the three grip block, carry out the molding to the hair and handle, consequently straighten hair board 101, intermediate lamella 102, curly hair board 103 three and all adopt heating conductor to make, the inside heater that all is provided with of three, and the heating principle of grip block can directly refer to prior art.

The first side of the middle plate 102 is opposite to the hair straightening plate 101, and the opposite side walls of the middle plate and the hair straightening plate are in a planar state, and the two side walls are matched to clamp hair to achieve the hair straightening function. The second side of the middle plate 102 is opposite to the hair curling plate 103, and the opposite side walls are arc-shaped waves with corresponding shapes, and the two are matched to clamp hair tightly, so that the hair is in a wavy curling state, and the hair curling function is realized.

When the straight hair curler provided by the application is applied, under the action of the locking mechanism, one of the straight hair plate 101 and the hair curling plate 103 is locked with the middle plate 102, and the other one is freely opened and closed with the middle plate 102 through the hinge structure at the tail part, so that a user can perform the hair straightening and hair curling styling treatment according to personal requirements. In addition, because the second sides of the hair curling plate 103 and the middle plate 102 are both wavy, compared with the mode of adopting a triangular heating conductor in the prior art, the wavy structure has less damage to the hair, and further the effect of protecting the hair is realized.

Optionally, in order to optimize the use effect of the straight hair curler and improve the practicability of the straight hair curler, in an embodiment provided by the present application, when the first side and the second side of the middle plate 102 are respectively attached to the straight hair plate 101 and the hair curling plate 103, the side walls of the straight hair plate 101, the middle plate 102 and the hair curling plate 103 can be combined into a cylindrical structure for curling hair. Specifically, the side walls of the hair straightening plate 101 and the hair curling plate 103 departing from the middle plate 102 are respectively arc-shaped, and the periphery of the clamping plate component 1 is cylindrical when the three clamping plates are attached. Meanwhile, the circumferential side walls of the cylindrical structures are provided with heating conductors capable of heating for perming. In the use, the user can twine the hair in succession around this cylindric structure's periphery, realizes the function of peripheral cylinder curly hair. It will be appreciated that hair treated with this styling functionality exhibits another curling effect than wavy curls.

Optionally, in order to optimize the use effect of the straight curler, the present application provides an embodiment in which the side wall of the straight hair plate 101 or the hair curling plate 103 facing away from the middle plate 102 is provided with comb teeth 104 for combing hair. Specifically, the peripheral of the clamping plate component 1 is fixed with comb teeth 104, so that the hair combing function is realized, and the practicability of the straight hair curler is further improved.

Optionally, when peripheral cylindrical hair curling is performed, the hair tips are not easily fixed on the clamping plate assembly 1, and actual operation of a user is inconvenient. Thus, in one embodiment provided herein, the side wall of the hair straightening plate 101 or the hair curling plate 103 facing away from the middle plate 102 is hinged with a clip 105, the clip 105 being adapted to cooperate with the cylindrical structure to clamp hair. Specifically, a clamping piece 105 is hinged to the circumferential side wall of the clamping plate assembly 1, the clamping piece 105 is a lath with an arc-shaped cross section, and the tail end of the clamping piece protrudes in the direction away from the clamping plate assembly 1 to form a pressing rod. The clip 105 is raised to engage the outer side wall of the splint assembly 1 to clamp hair around the outer perimeter of the cylindrical structure.

It can be understood that, when the clamping plate assembly 1 is provided with the comb teeth 104 and the clamping pieces 105 at the same time, and the two are arranged on the periphery of the same clamping plate, the middle part of the comb teeth 104 needs to be provided with a notch avoiding the clamping pieces 105, so as to ensure the normal operation of the clamping pieces 105.

Further, referring to fig. 3, in an embodiment of the adjusting assembly 2 provided by the present application, the adjusting assembly 2 includes a hair straightening key 201, a middle key 202, and a hair curling key 203 respectively disposed at the tail portions of the hair straightening plate 101, the middle plate 102, and the hair curling plate 103, and the hair straightening key 201, the middle key 202, and the hair curling key 203 are hinged by a hinge rod 204; the locking mechanism comprises a lock pin rod 209 arranged on the middle key 202, and the hair straightening key 201 and the hair curling key 203 are respectively provided with a lock pin structure which can be matched and fixed with the lock pin rod 209.

Specifically, the hair straightening key 201 can be fixed to the hair straightening plate 101 by clamping or bonding or integral manufacturing, and the fixing modes of the hair curling key 203, the middle key 202 and the corresponding clamping plates are not described again. The hair straightening key 201, the hair curling key 203 and the middle key 202 are respectively provided with hinge holes 205 corresponding to the positions, and the three are hinged on the same hinge rod 204. The locking pin rod 209 is located in the locking through hole 207 in the middle of the middle key 202, and the middle of the locking pin rod 209 substantially conforms to the side wall of the locking through hole 207. The locking pin structure of the hair straightening key 201 and the locking pin structure of the hair curling key 203 can be locked with the locking pin rod 209, and only one of the two is in a locking state with the locking pin rod 209 during the working process.

In use, the hair straightening key 201, the hair curling key 203 and the middle key 202 are hinged, so that the hair straightening key 201 and the hair curling key 203 can rotate freely relative to the middle key 202 by taking the hinge rod 204 as a center. And one of the hair straightening key 201 and the hair curling key 203 is locked with the middle key 202 and the other is hinged with the middle key 202 because the hair straightening curler is provided with the locking pin structure. The locking states of the locking pin structure of the hair straightening key 201 and the locking pin structure of the hair curling key 203 and the locking pin rod 209 are adjusted, so that the hair straightening and hair curling functions of the product can be freely switched.

Optionally, in an embodiment provided by the present application, the lock pin rod 209 includes a rod body and a protrusion disposed on the outer periphery of the rod body; the lock pin structure comprises a lock pin hole, one side of the lock pin hole is a large hole capable of accommodating the lug, the other side of the lock pin hole is a sliding hole capable of allowing the rod body to move, and an inward shrinkage structure for preventing the lug from sliding from the large hole to the sliding hole is arranged at the intersection of the sliding hole and the large hole; the locking mechanism further comprises a shift position changing key 6 for pushing the locking pin rod 209 in the axial direction so that the projection is located in the large hole of the hair straightening key 201 or in the large hole of the hair curling key 203.

Specifically, the locking pin structures of the hair straightening key 201 and the hair curling key 203 are a hair straightening key locking pin hole 206 and a hair curling key locking pin hole 208, the hair straightening key locking pin hole 206 is taken as an example for explanation in this embodiment, and the hair curling key locking pin hole 208 is not described in detail.

The big hole and the sliding hole form a complete special-shaped lock pin hole. Wherein, the shape and the size of the macropore correspond to the shape and the size of the bump. The sliding holes are used for being matched with the rod bodies, and the rod bodies can freely move in the sliding holes in the opening and closing processes of the hair straightening plate 101 and the middle plate 102. The retraction structure is located at the junction position of the large hole and the sliding hole, and can be an opening with a distance smaller than the outer diameter of the bump. In addition, the preferred slide opening of this embodiment is the bar through-hole that has certain radian, and the clearance width of bar through-hole is slightly greater than the external diameter of the body of rod, is less than the external diameter of lug simultaneously, and the slide opening can directly regard as the structure that contracts inwards to use this moment.

The shift position changing key 6 is abutted against the end of the lock pin rod 209, so that the position of the projection is adjusted in the axial direction, and the position of the projection is switched between the straight key lock pin hole 206 and the hair key lock pin hole 208.

It is noted that for the straight key pin hole 206 and the curly key pin hole 208, the large holes thereof correspond to the locking through hole 207, and the sliding holes thereof are disposed on both sides of the locking through hole 207. That is, taking fig. 2, 5 and 6 as an example, when the hair straightening plate 101 is positioned on the upper side of the middle plate 102, the sliding holes on the hair straightening keys 201 are positioned on the upper side of the large holes, and the sliding holes on the hair curling keys 203 are positioned on the lower side of the large holes.

Optionally, in a preferred embodiment provided by the present application, the locking pin hole includes: the left straightening key lock pin hole 206 and the right straightening key lock pin hole 206 which are arranged on the straightening key 201, the left curling key lock pin hole 208 and the right curling key lock pin hole 208 which are arranged on the curling key 203, and the left straightening key lock pin hole 206, the left curling key lock pin hole 208, the locking through hole 207, the right curling key lock pin hole 208 and the right straightening key lock pin hole 206 are sequentially distributed along the axial direction of the lock pin rod 209; the protrusions include a left protrusion 2091 and a right protrusion 2092, and the distance between the left protrusion 2091 and the right protrusion 2092 is equal to the distance between the left straight key locking pin hole 206 and the right straight key locking pin hole 206.

Specifically, the hair straightening key 201, the hair curling key 203 and the middle key 202 are arranged in sequence from two sides to the middle, and the left projection 2091, the right projection 2092 and the middle projection 2093 between the two have the same shape and outer diameter. The big holes at the lower ends of the two straight key lock pin holes 206 are the same as the left projection 2091 and the right projection 2092 in shape, and the gap of the sliding holes extending upwards is smaller than the sizes of the left projection 2091 and the right projection 2092; the two hair key locking pin holes 208 have large holes at the upper ends thereof in the same shape as the left projection 2091 and the right projection 2092, the gap between the downwardly extending sliding holes is smaller than the size of the left projection 2091 and the right projection 2092, and the locking through hole 207 has the same size as the middle projection 2093.

When performing the hair curling function, the right protrusion 2092 is located at the right side of the straight key locking pin hole 206, the left protrusion 2091 is engaged at the left side of the straight key locking pin hole 206, the middle key 202 and the straight key 201 are fixed by the locking pin rod 209, and the hair curling key 203 is rotatable around the hinge rod 204.

When the hair straightening function is performed, the right protrusion 2092 is located at the right hair key pin hole 208, the left protrusion 2091 is disengaged from the left hair key pin hole 206, the left hair key pin hole 208 is located at the middle protrusion 2093, and the left hair key pin hole 206 is located at the rod body between the left protrusion 2091 and the middle protrusion 2093. At this time, the middle key 202 and the hair curling key 203 are fixed by the locking pin rod 209, and the hair straightening key 201 can rotate around the hinge rod 204.

In this embodiment, the axial position of the locking pin rod 209 can be controlled to complete the switching of the corresponding functions, and the locking pin device has the characteristics of convenience in operation and convenience in use.

Further, in order to facilitate the use of the user, in the present embodiment, the hair curling key 203 is disposed between the hair straightening key 201 and the middle key 202, the pressing handle 210 is connected to the hair straightening key 201, the return spring 211 is disposed inside the hair straightening key, one end of the return spring 211 abuts against the pressing handle 210, and the other end abuts against the hair curling key 203. Specifically, during use, when the user presses the pressing handle 210, one of the hair curling plate 103 and the hair straightening plate 101 can be separated from the middle plate 102 while the other is stationary, thereby performing a hair curling function or a hair straightening function. And after the external force is removed, the separated clamping plates are reset under the action of the reset spring 211.

Optionally, in an embodiment provided by the present application, the handle 3 of the straight hair curler is fixedly connected to the straight hair key 201, the hair curling key 203 and the middle key 202, the tail of the handle 3 is provided with the power line 5 and the on-off key 4, and in addition, for the convenience of the user's operation, the gear shift key 6 is disposed on the side wall of the handle 3.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The straight hair curler provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A straight hair curler, comprising:

a middle plate (102) with a plate-shaped first side and a wavy second side;

a hair straightening plate (101) which is used for being matched with the first side of the middle plate (102) to clamp and straighten hair, wherein the hair straightening plate (101) is in a plate shape towards the side wall of the middle plate (102), and the tail part of the hair straightening plate (101) is hinged with the tail part of the middle plate (102);

a curling plate (103) for clamping with the second side of the middle plate (102) to curl hair, wherein the curling plate (103) is waved towards the side wall of the middle plate (102), and the tail part of the curling plate (103) is hinged with the tail part of the middle plate (102);

and the locking mechanism is used for attaching and locking one of the hair straightening plate (101) and the hair curling plate (103) with the middle plate (102), and the middle plate (102), the hair straightening plate (101) and the hair curling plate (103) are respectively connected with the locking mechanism.

2. The hair straightener of claim 1, wherein the side walls of the hair straightening plate (101), the middle plate (102) and the hair curling plate (103) can be assembled into a cylindrical structure for curling hair in a state that the first side and the second side of the middle plate (102) are attached to the hair straightening plate (101) and the hair curling plate (103), respectively.

3. Straight curler according to claim 2, characterized in that the side wall of the straight board (101) or the curling board (103) facing away from the intermediate board (102) is provided with comb teeth (104) for combing hair.

4. Straight curler as claimed in claim 3, characterized in that the lateral wall of the straightening plate (101) or of the curling plate (103) facing away from the intermediate plate (102) is hinged with a clip (105), said clip (105) being intended to cooperate with said cylindrical structure to grip the hair.

5. The straight curler of any one of claims 1 to 4, wherein the tail parts of said straight hair plate (101), said curler plate (103) and said middle plate (102) are respectively provided with a straight hair key (201), a curler key (203) and a middle key (202), and said straight hair key (201), said curler key (203) and said middle key (202) are hinged by a hinge rod (204); the locking mechanism comprises a lock pin rod (209) arranged on the middle key (202), and the hair straightening key (201) and the hair curling key (203) are respectively provided with a lock pin structure which can be matched and fixed with the lock pin rod (209).

6. The straight curler of claim 5, wherein said latch rod (209) comprises a rod body and a protrusion provided on an outer circumference of said rod body; the locking pin structure comprises a locking pin hole, one side of the locking pin hole is a large hole capable of containing the lug, the other side of the locking pin hole is a sliding hole capable of allowing the rod body to move, and an inward shrinkage structure used for preventing the lug from sliding from the large hole to the sliding hole is arranged at the intersection of the sliding hole and the large hole; the locking mechanism further comprises a gear shifting key (6) for pushing the locking pin rod (209) in the axial direction so that the projection is located in the large hole of the hair straightening key (201) or in the large hole of the hair curling key (203).

7. Straight curler as claimed in claim 6, characterized in that said intermediate key (202) is provided with a locking through hole (207) engaging with the middle of said locking pin rod (209); the lock pin hole includes: the hair straightening key is characterized in that the hair straightening key is provided with a left hair straightening key locking pin hole (206) and a right hair straightening key locking pin hole (206) which are arranged on the left side of the hair straightening key (201), and a left hair curling key locking pin hole (208) and a right hair curling key locking pin hole (208) which are arranged on the left side of the hair curling key (203), and the left hair straightening key locking pin hole (206), the left hair curling key locking pin hole (208), the locking through hole (207), the right hair curling key locking pin hole (208) and the right hair straightening key locking pin hole (206) are sequentially distributed along the axial direction of the locking pin rod (209); the protruding block comprises a left protruding block (2091) and a right protruding block (2092), and the distance between the left protruding block (2091) and the right protruding block (2092) is equal to the distance between the straight key lock pin hole (206) on the left side and the distance between the straight key lock pin hole (206) on the right side.

8. The hair straightener according to claim 7, wherein the hair curling key (203) is arranged between the hair straightening key (201) and the middle key (202), the hair straightening key (201) is connected with a pressing handle (210), a return spring (211) is arranged inside the hair straightening key, one end of the return spring (211) is abutted against the pressing handle (210), and the other end of the return spring is abutted against the hair curling key (203).

9. The straight curler of claim 8, further comprising a handle (3) for facilitating the operation, wherein the handle (3) is fixedly connected with the straight hair key (201), the hair curling key (203) and the middle key (202), a power line (5) and an on-off key (4) are arranged at the tail part of the handle (3), and the gear shifting key (6) is arranged on the side wall of the handle (3).